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Home My WebLink AboutSupplemental FormsSUPPLEMENT-EZ COVER PAGE FORMS LOADED OJECT INFORMATION 1 Project Name Mitchell County Middle School 2 Project Area ac 14.63 3 Coastal Wetland Area ac NA 4 Surface Water Area ac 0.3 5 Is this project High or Low Density? High 6 1 Does this project use an off -site SCM? No COMPLIANCE WITH 02H .1003(4) 7 Width of vegetated setbacks provided feet 30 8 Will the vegetated setback remain vegetated? Yes 9 If BUA is proposed in the setback, does it meet NCAC 02H.1003 4 c-d ? N/A 10 Is streambank stabilization proposed on this project? No NUMBER AND TYPE OF SCMs: 11 Infiltration System 12 Bioretention Cell 13 Wet Pond 1 14 Stormwater Wetland 15 Permeable Pavement 16 Sand Filter 17 lRainwater Harvesting RWH 18 Green Roof 19 Level Spreader -Filter Strip LS-FS 20 Disconnected Impervious Surface DIS 21 Treatment Swale 22 Dry Pond 23 StormFilter 24 Silva Cell 25 Bayfilter 26 1 Filterra FORMS LOADED DESIGNER CERTIFICATION 27 Name and Title: Michael Cain, PE 28 Organization: Civil Design Concepts 29 Street address: 168 Patton Avenue 30 City, State, Zip: Asheville, NC 28801 31 Phone numbers : 828-252-5388 32 Email: mcain@cdcgo.com Certification Statement: I certify, under penalty of law that this Supplement-EZ form and all supporting information were prepared under my direction or supervision; that the information provided in the form is, to the best of my knowledge and belief, true, accurate, and complete; and that the engineering plans, specifications, operation and maintenance agreements and other supporting information are consistent with the information provided here. CARO E SI0 .. F/ SEAL - 047788 FNG INEE� AEL J•G Signature AVesigner 1� C;l ZIOZ_ D to DRAINAGE AREAS 1 Is this a high density project? Yes 2 If so, number of drainage areas/SCMs 1 3 Does this project have low density areas? No 4 If so, number of low density drainage areas 0 5 Is all/part of this project subject to previous rule versions? No FORMS LOADED DRAINAGE AREA INFORMATION Entire Site 1 4 Type of SCM Wet Pond 5 Total drainage area (sq ft 329314 6 Onsite drainage area (sq ft) 325292 7 Offsite drainage area (sq ft 4022 8 Total BUA in project (sq ft 154202 sf 9 New BUA on subdivided lots (subject to permitting) (sq ft NA 10 New BUA not on subdivided lots (subject to permitting) (so Offsite BUA (sq ft) Breakdown of new BUA not on subdivided lots: Parking (sq ft Sidewalk (sq ft 154202 sf 11 NA 12 48007 sf 9872 sf Roof (sq ft 67783 sf Roadway (sq ft) 24366 sf Future (sq ft NA Other, please specify in the comment box below (sq ft) 4174 sf 13 New infiltrating permeable pavement on subdivided lots (sq ft NA 14 New infiltrating permeable pavement not on subdivided lots (sq ft) Existing BUA that will remain (not subject to s ft NA 15permitting) NA 16 Existing BUA that is already permitted (sq ft) 4792 sf 17 Existing BUA that will be removed (sq ft 4792 sf 18 Percent BUA 47% 19 IDesign storm inches 3.3 in 20 Design volume of SCM cu ft 32541 cf 21 Calculation method for design volume DITIONALOYFORMATION Please use this space to provide any additional information about the 22 drainage area(s): Other impervious includes outdoor court SA/DA WET POND 1 Drainage area number 1 2 1 Minimum required treatment volume cu ft 15094 cf GENERAL MDC FROM 02H .1050 3 Is the SCM sized to treat the SW from all surfaces at build -out? Yes 4 Is the SCM located away from contaminated soils? Yes 5 What are the side slopes of the SCM (H:V)? 3:1 6 Does the SCM have retaining walls, gabion walls or other engineered side slopes? No 7 Are the inlets, outlets, and receiving stream protected from erosion (10-year storm)? Yes 8 Is there an overflow or bypass for inflow volume in excess of the design volume? Yes 9 What is the method for dewatering the SCM for maintenance? Drawdown Orifice 10 If applicable, will the SCM be cleaned out after construction? Yes 11 Does the maintenance access comply with General MDC (8)? Yes 12 Does the drainage easement comply with General MDC 9 ? Yes 13 If the SCM is on a single family lot, does (will?) the plat comply with General MDC (10)? Yes 14 Is there an O&M Agreement that complies with General MDC (11)? Yes 15 Is there an O&M Plan that complies with General MDC 12 ? Yes 16 Does the SCM follow the device specific MDC? Yes 17 Was the SCM designed by an NC licensedprofessional? Yes WET POND MDC FROM 02H .1053 18 Sizing method used SA/DA 19 Has a stage/storage table been provided in the calculations? Yes 20 Elevation of the excavated main pool depth (bottom of sediment removal) (fmsl 2719.00 21 Elevation of the main pool bottom (top of sediment removal) (fmsl) 2720.00 22 Elevation of the bottom of the vegetated shelf fmsl 2725.00 23 Elevation of the permanent pool (fmsl) 2725.00 24 Elevation of the top of the vegetated shelf (fmsl) 2726.00 25 Elevation of the temporary pool (fmsl) 2726.10 26 Surface area of the main permanent pool (square feet) 8909 27 Volume of the main permanent pool cubic feet 32541 cf 28 Average depth of the main pool feet 5.00 ft 29 Average depth equation used Equation 2 30 If using a uation 3, main pool perimeter feet 31 If using equation 3, width of submerged veg. shelf (feet) 32 Volume of the forebay cubic feet 6404 cf 33 Is this 15-20% of the volume in the main pool? Yes 34 Clean -out depth for forebainches 12in 35 Design volume of SCM cu ft 15094 cf 36 Is the outlet an orifice or a weir? Orifice 37 If orifice, orifice diameter inches 3 in 38 If weir, weir height (inches) 39 If weir, weir length inches 40 Drawdown time for the temporary pool (days) 2.4 41 Are the inlet(s) and outlet located in a manner that avoids short- circuiting? Yes 42 Are berms or baffles provided to improve the flow path? Yes 43 Depth of forebay at entrance (inches) 48 in 44 Depth of forebay at exit (inches) 36 in 45 Does water flow out of the forebay in a non -erosive manner? Yes 46 Width of the vegetated shelf (feet) 6 ft 47 Slope of vegetated shelf (H:V) 6:1 48 Does the orifice drawdown from below the top surface of the permanentpool? Yes 49 Does the pond minimize impacts to the receiving channel from the 1- r, 24-hr storm? Yes 50 Are fountains proposed? (If Y, please provide documentation that MDC 9 is met. No 51 Is a trash rack or other device provided to protect the outlet system? Yes 52 Are the dam and embankment planted in non -clumping turf grass? Yes 53 Species of turf that will be used on the dam and embankment Fescue 541 Hasa planting plan been provided for the vegetated shelf? Yes ADDITIONAL INFORMATION 55 Please use this space to provide any additional information about the wet pond(s): Wet Pond 1 10:40 AM 1/5/2023